Which One of the Following Statements Is TRUE

Which one of the following statements is TRUE?

A) There has been no research on understanding the relations between oral language,code skills,and reading achievement.
B) Preschool teachers are encouraged to teach code skills before oral language skills in order to promotes reaching achievement.
C) Oral language has been found to interfere with preschool children's reading fluency.
D) Preschool children's oral language skills plays an important role in predicting reading in the transition to school.